| 1. |
- Bondemark, Lars, et al.
(författare)
-
Funktionsstörningar och smärta
- 2008
-
Ingår i: Tandläkartidningen. - 0039-6982. ; 100:9-10, s. 64-68
-
Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Orofaciala funktionsstörningar och smärta är en sammanfattning av kliniska problem och sjukdomar som involverar bett, käkar, tuggmuskulatur, käkleder och omgivande strukturer. Orsakerna är oftast multifaktoriella för de barn, ungdomar och vuxna som drabbas.
|
|
| 2. |
- Eriksson, Lill, et al.
(författare)
-
Lavage treatment of painful jaw movements at disc displacement without reduction : a randomized controlled trial in a short-term perspective
- 2013
-
Ingår i: International Journal of Oral and Maxillofacial Surgery. - : Elsevier. - 0901-5027 .- 1399-0020. ; 42:3, s. 356-363
-
Tidskriftsartikel (refereegranskat)abstract
- This study compared the short-term efficacy of two treatments (local anesthetics (A) and local anesthetics and lavage (AL)) in patients with permanently displaced discs and temporomandibular disorder (TMD) pain. 45 patients participated in the single-blind randomized controlled trial. All patients had received: a Research Diagnostic Criteria/TMD diagnosis of disc displacement without reduction; and magnetic resonance imaging confirmation of non-reducing disc displacement. Participants were randomized to treatment with A or AL and were assessed at baseline and at 1 and 3 month follow-ups. The primary outcome measure defining success was reduction in pain intensity of at least 30% during jaw movement. At the 3 month follow-up, the success rate was 76% for A and 55% for AL. Both groups reported similar pain relief with no significant difference between the groups. Similar trends were observed for outcome measures in the physical functioning, emotional functioning, and global improvement domains with no significant difference between the groups. Use of lavage to supplement extra-articular local anesthetic treatment of painful jaw movements at non-reducing discs does not appear to improve TMD pain and mouth opening capacity in the short term
|
|
| 3. |
- Joffrin, E., et al.
(författare)
-
Overview of the JET preparation for deuterium-tritium operation with the ITER like-wall
- 2019
-
Ingår i: Nuclear Fusion. - : IOP Publishing. - 1741-4326 .- 0029-5515. ; 59:11
-
Forskningsöversikt (refereegranskat)abstract
- For the past several years, the JET scientific programme (Pamela et al 2007 Fusion Eng. Des. 82 590) has been engaged in a multi-campaign effort, including experiments in D, H and T, leading up to 2020 and the first experiments with 50%/50% D-T mixtures since 1997 and the first ever D-T plasmas with the ITER mix of plasma-facing component materials. For this purpose, a concerted physics and technology programme was launched with a view to prepare the D-T campaign (DTE2). This paper addresses the key elements developed by the JET programme directly contributing to the D-T preparation. This intense preparation includes the review of the physics basis for the D-T operational scenarios, including the fusion power predictions through first principle and integrated modelling, and the impact of isotopes in the operation and physics of D-T plasmas (thermal and particle transport, high confinement mode (H-mode) access, Be and W erosion, fuel recovery, etc). This effort also requires improving several aspects of plasma operation for DTE2, such as real time control schemes, heat load control, disruption avoidance and a mitigation system (including the installation of a new shattered pellet injector), novel ion cyclotron resonance heating schemes (such as the three-ions scheme), new diagnostics (neutron camera and spectrometer, active Alfven eigenmode antennas, neutral gauges, radiation hard imaging systems...) and the calibration of the JET neutron diagnostics at 14 MeV for accurate fusion power measurement. The active preparation of JET for the 2020 D-T campaign provides an incomparable source of information and a basis for the future D-T operation of ITER, and it is also foreseen that a large number of key physics issues will be addressed in support of burning plasmas.
|
|
| 4. |
- Pigg, Maria, et al.
(författare)
-
A comparative analysis of MRI, CBCT and conventional radiography in patients with atypical odontalgia and symptomatic apical periodontitis : preliminary results
- 2006
-
Ingår i: Swedish Dental Journal. - 0347-9994. ; 30:4, s. 173-174
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Aim: Atypical odontalgia(AO) is a chronic pain condition located in the teeth and jaws. It has been suggested, that AO is best regarded as a neuropathic pain condition, but knowledge regarding the etiology, diagnostics, and management of AO is not yet satisfactory. This pilot study evaluates the clinical usefulness of more recently developed imaging methods for intraoral pain conditions. The aim is to compare the diagnostic findings using magnetic resonance imaging(MRI) and cone beam computed tomography(CBCT) with the findings from conventional radiography in patients with atypical odontalgia(AO) and symptomatic apical periodontitis(SAP). Material and methods: 12 patients (9 F, 3 M) mean age 50,25 years, range 36 - 63 years participated in the study. The patients were referred to the Orofacial Pain Unit or the Department of Endodontics, Faculty of Odontology, Malmö University. Inclusion criteria for AO were chronic pain (>6 months) located in a region where a tooth had been endodontically or surgically treated, pain with no pathological cause detectable in clinical or radiological examinations. For SAP, the inclusion criteria were recurrent pain from a tooth diagnosed with apical periodontitis in a clinical and radiographic examination. Ten of the patients in the study were diagnosed with AO and two with SAP. The patients were clinically assessed with a qualitative somatosensory examination, a dental examination, an examination of the masticatory system(RDC/TMD), and panoramic and intraoral radiographs. A questionnaire was used to gather information about pain characteristics, psychosocial status(SCL-90), and quality of life. Besides these measures, each patient underwent a CBCT(3D-Accuitomo, J Morita Co) examination and a MRI(Siemens Sonata Vision 1.5 T) examination with and without contrast enhancement. Contrast was enhanced by injections of Magnevist (469 mg/ml, Schering Nordiska). Bone destruction, sclerosis, and signs of inflammation were the main parameters studied. Results: In the preliminary results, average pain intensity was 6.3 on a numerical rating scale(NRS) and average pain duration was 3,6 years. 83% exhibited somatosensory abnormalities. Bone destruction not visible in the intraoral and panoramic radiographs was detected with CBCT in 40% (4/10) of the patients diagnosed with AO, and signs of inflammation were detected in the MRIs of 20% (2/10) of the patients diagnosed with AO. Conclusion: Preliminary findings indicate that CBCT and MRI can provide additional information to conventional radiography in the diagnosis of intraoral orofacial pain. Further studies with larger sample sizes of AO and SAP patients are necessary to determine the clinical relevance of these findings.
|
|
| 5. |
|
|
| 6. |
- Pigg, Maria, et al.
(författare)
-
Diagnostic yield of conventional radiographic and cone-beem computed tomographic images in patients with atypical odontalgia
- 2011
-
Ingår i: International Endodontic Journal. - : John Wiley & Sons. - 0143-2885 .- 1365-2591. ; 12:44, s. 1092-1101
-
Tidskriftsartikel (refereegranskat)abstract
- Abstract AIM: To investigate whether the additional diagnostic yield of a cone-beam computed tomography (CBCT) examination over conventional radiographs in patients primarily suspected of having atypical odontalgia (AO) improves differentiation between AO and symptomatic apical periodontitis (SAP) in patients with severe chronic intraoral pain. METHODOLOGY: In this clinical study, 25 patients (mean age 54 ± 11 years, range 34-72) participated; 20 were diagnosed with AO and 5 with SAP. All patients were recruited from the clinics of the Faculty of Odontology, Malmö University. AO inclusion criteria were chronic pain (>6 months) in a region where a tooth had been endodontically or surgically treated, with no pathological cause detectable in clinical or radiologic examinations. SAP inclusion criteria were recurrent pain from a tooth diagnosed with apical periodontitis in clinical and radiographic examinations. Assessments comprised a self-report questionnaire on pain characteristics, a comprehensive clinical examination and a radiographic examination including panoramic and intraoral radiographs and CBCT images. The main outcome measure was periapical bone destruction. RESULTS: Sixty per cent of patients with AO had no periapical bone destructions detectable with any radiographic method. Overall, CBCT rendered 17% more periapical bone destructions than conventional radiography. Average pain intensity in patients with AO was 5.6 (± 1.8) on a 0-10 numerical rating scale, and average pain duration was 4.3 (± 5.2) years. CONCLUSION: Cone-beam computed tomography improves identification of patients without periapical bone destruction, which may facilitate differentiation between AO and SAP.
|
|
| 7. |
- Wolf, Eva, et al.
(författare)
-
Long-term follow-up by means of a questionnaire of 109 patients with long-lasting orofacial pain.
- 2002
-
Ingår i: Swedish Dental Journal. - : Swedish Dental Association. - 0347-9994. ; 26:3, s. 125-34
-
Tidskriftsartikel (refereegranskat)abstract
- The aims were to follow-up, analyse and compare the pain status after 4-9 years with that at the baseline examination of 109 consecutive patients referred to the Pain Group at the Faculty of Odontology in Malmö, Sweden during the period 1988-1993 due to long-lasting orofacial pain. A further aim was to identify predictive factors of significance for pain alteration. 85 (78%) women with a median age of 51 years and 24 (22%) men with a median age of 60 years were included in the study. A survey of the pain status at the follow-up was conducted by means of a mailed questionnaire. The questionnaire covered the following aspects: pain alteration, pain intensity, pain location, medication and education. After one reminder, the non-responding patients were called for a telephone interview. A response level of 85% was obtained. Significant improvements were noted by the patients in the answers of the questionnaire in mainly three areas; the patients answered individually that pain relief had occurred, pain intensity rated on the VAS was lower at follow-up compared to the baseline examination and a decrease in drug use was reported. The responses indicated pain relief for 75% of the patients. However, only 27% of the patients experienced total disappearance of pain. Medication at baseline with opioids, muscle relaxants with central effect, antidepressants, neuroleptics, hypnotics or sedatives was found to be a predictive factor for persistent pain.
|
|
| 8. |
- Ahmed, Naveen, et al.
(författare)
-
Tumor necrosis factor mediates temporomandibular joint bone tissue resorption in rheumatoid arthritis
- 2015
-
Ingår i: Acta Odontologica Scandinavica. - : Taylor & Francis. - 0001-6357 .- 1502-3850. ; 73:3, s. 232-240
-
Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To investigate if TNF, IL-1 or their endogenous controls, in relation to ACPA, are associated with radiological signs of ongoing temporomandibular joint (TMJ) bone tissue resorption and disc displacement in RA patients. METHODS: Twenty-two consecutive outpatients with TMJ of RA were included. Systemic inflammatory activity was assessed by DAS28. The number of painful regions in the body and ESR, CRP, RF and ACPA were analyzed. TMJ synovial fluid and blood samples were obtained and analyzed for TNF, TNFsRII, IL-1ra, IL-1sRII and ACPA. The ratios between the mediators and their endogenous control receptors were used in the statistical analysis. Magnetic resonance imaging was performed in closed- and open-mouth positions and evaluated regarding disc position and presence of condylar and temporal erosions of the TMJ. RESULTS: A high TNF level in relation to TNFsRII in TMJ synovial fluid correlated to the degree of TMJ condylar erosion. A high IL-1ra level in relation to TNF in TMJ synovial fluid was also correlated to the degree of TMJ condylar erosion. The total degree of TMJ condylar erosion was correlated with the number of painful regions. CONCLUSION: This study indicates that TNF in TMJ synovial fluid mediates TMJ cartilage and bone tissue resorption in RA. The study also suggests that the degree of endogenous cytokine control is of importance for development of bone tissue destruction.
|
|
| 9. |
- Andersson, Arne, et al.
(författare)
-
Approximate Indexed Lists.
- 1998
-
Ingår i: Journal of Algorithms. ; 29:2
-
Tidskriftsartikel (refereegranskat)abstract
- Let the position of a list element in a list be the number of elements preceding it plus one. An indexed list supports the following operations on a list: Insert; delete; return the position of an element; and return the element at a certain position. The order in which the elements appear in the list is completely determined by where the insertions take place; we do not require the presence of any keys that induce the ordering.We consider approximate indexed lists, and show that a tiny relaxation in precision of the query operations allows a considerable improvement in time complexity. The new data structure has applications in two other problems; namely, list labeling and subset rank.
|
|
| 10. |
- Andersson, Arne, et al.
(författare)
-
Tight bounds for searching a sorted array of strings
- 2000
-
Ingår i: SIAM journal on computing (Print). - 0097-5397 .- 1095-7111. ; 30:5, s. 1552-1578
-
Tidskriftsartikel (refereegranskat)abstract
- Given a k-character query string and an array of n strings arranged in lexicographical order, computing the rank of the query string among the n strings or deciding whether it occurs in the array requires the inspection [GRAPHICS] characters in the worst case.
|
|
| 11. |
- Bakke, Merete, et al.
(författare)
-
Modified condylotomy versus conventional conservative treatment in painful reciprocal clicking-a preliminary prospective study in eight patients
- 2008
-
Ingår i: Clinical Oral Investigations. - : Springer Science and Business Media LLC. - 1432-6981 .- 1436-3771. ; 12:4, s. 353-359
-
Tidskriftsartikel (refereegranskat)abstract
- Modified condylotomy may be relevant in severe painful reciprocal clicking of the temporomandibular joint (TMJ) where conservative treatment is insufficient. The effect of the modified condylotomy was analyzed and compared with conventional nonsurgical treatment in a randomized pilot study of eight patients, 19-44 years of age, with severe painful reciprocal clicking. Before and after treatment, assessments were performed by subjective reports, clinical recordings, and blinded evaluations of radiography and magnetic resonance imaging (MRI). Based on the clinical evaluations before treatment, all conditions were disc displacements with reduction and arthralgia (Research diagnostic criteria for temporomandibular disorders), but based on MRI, one patient had disc displacement without reduction and another had normal disc position. The treatment effect was significantly better and the disorders were significantly more reduced with condylotomy than with conventional nonsurgical treatment (P < 0.05, Mann-Whitney U test). In the surgical group, the clicking and locking had disappeared, the pain during function was significantly reduced (P < 0.05, Friedman ANOVA), and in two patients the disc position was normalized. The clicking still persisted in the nonsurgical patients and the disc position was unchanged. Our conclusion is that modified condylotomy is a promising option to reduce symptoms and signs in severe painful reciprocal clicking.
|
|
| 12. |
- Bergenholtz, Gunnar, 1939, et al.
(författare)
-
Treatment of pulps in teeth affected by deep caries - A systematic review of the literature.
- 2013
-
Ingår i: Singapore dental journal. - : World Scientific Pub Co Pte Lt. - 0377-5291. ; 34:1, s. 1-12
-
Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: This systematic review assesses the effect of methods commonly used to manage the pulp in cases of deep caries lesions, and the extent the pulp chamber remains uninfected and does not cause pulpal or periapical inflammatory lesions and associated tooth-ache over time.STUDY DESIGN: An electronic literature search included the databases PubMed, EMBASE, The Cochrane Central Register of Controlled Trials and Cochrane Reviews from January 1950 to March 2013. In addition, hand searches were carried out. Two reviewers independently evaluated abstracts and full-text articles. An article was read in full if at least one of the two reviewers considered the abstract potentially relevant. Altogether, 161 articles were read in full text. Of these, 24 studies fulfilled established inclusion criteria. Based on studies of at least moderate quality, the quality of evidence of each procedure was rated in four levels according to GRADE.RESULTS: No study reached the high quality level. Twelve were of moderate quality. The overall evidence was insufficient to assess which of indirect pulp capping, stepwise excavation, direct excavation and pulp capping/partial pulpotomy, pulpotomy or pulpectomy is the most effective treatment approach for teeth with deep caries.CONCLUSIONS: Because of the lack of good studies it is not possible to determine whether an injured pulp by deep caries can be maintained or whether it should be removed and replaced with a root canal filling. Both randomized studies and prospective observational studies are needed to investigate whether a pulp exposed to deep caries is best treated by measures intended to preserve it or by pulpectomy and root filling.
|
|
| 13. |
|
|
| 14. |
- Bonanomi, N., et al.
(författare)
-
Role of fast ion pressure in the isotope effect in JET L-mode plasmas
- 2019
-
Ingår i: Nuclear Fusion. - : Institute of Physics Publishing (IOPP). - 0029-5515 .- 1741-4326. ; 59:9
-
Tidskriftsartikel (refereegranskat)abstract
- This paper presents results of JET ITER-like wall L-mode experiments in hydrogen and deuterium (D) plasmas, dedicated to the study of the isotope dependence of ion heat transport by determination of the ion critical gradient and stiffness by varying the ion cyclotron resonance heating power deposition. When no strong role of fast ions in the plasma core is expected, the main difference between the two isotope plasmas is determined by the plasma edge and the core behavior is consistent with a gyro-Bohm scaling. When the heating power (and the fast ion pressure) is increased, in addition to the difference in the edge region, also the plasma core shows substantial changes. The stabilization of ion heat transport by fast ions, clearly visible in D plasmas, appears to be weaker in H plasmas, resulting in a higher ion heat flux in H with apparent anti-gyro-Bohm mass scaling. The difference is found to be caused by the different fast ion pressure between H and D plasmas, related to the heating power settings and to the different fast ion slowing down time, and is completely accounted for in non-linear gyrokinetic simulations. The application of the TGLF quasi-linear model to this set of data is also discussed.
|
|
| 15. |
- Cannas, Barbara, et al.
(författare)
-
Recurrence Plots for Dynamic Analysis of Type-I ELMs at JET With a Carbon Wall
- 2019
-
Ingår i: IEEE Transactions on Plasma Science. - : Institute of Electrical and Electronics Engineers (IEEE). - 0093-3813 .- 1939-9375. ; 47:4, s. 1871-1877
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper, the dynamic characteristics of type-I edge-localized modes (ELM) time series from the JET tokamak, the world's largest magnetic confinement plasma physics experiment, have been investigated through recurrence plots (RPs). The analysis has been focused on RPs of pedestal temperature, line averaged electron density, and outer divertor D-alpha time series during experiments with a carbon wall. The analysis of RPS shows the patterns similar to those characteristics of signals exhibiting type-2 intermittency, in particular, a characteristic kite-like shape; this gives useful hints to model the temperature signal as well as the D-alpha radiation time series, with simple nonlinear maps capturing the nearly periodic behavior of type-I ELMs.
|
|
| 16. |
- Carlsson, Katrin, et al.
(författare)
-
Fear and the Amygdala : Manipulation of Awareness Generates Differential Cerebral Responses to Phobic and Fear-Relevant (but Nonfeared) Stimuli
- 2004
-
Ingår i: Emotion. - : American Psychological Association (APA). - 1528-3542 .- 1931-1516. ; 4:4, s. 340-353
-
Tidskriftsartikel (refereegranskat)abstract
- Rapid response to danger holds an evolutionary advantage. In this positron emission tomography study, phobics were exposed to masked visual stimuli with timings that either allowed awareness or not of either phobic, fear-relevant (e.g., spiders to snake phobics), or neutral images. When the timing did not permit awareness, the amygdala responded to both phobic and fear-relevant stimuli. With time for more elaborate processing, phobic stimuli resulted in an addition of an affective processing network to the amygdala activity, whereas no activity was found in response to fear-relevant stimuli. Also, right prefrontal areas appeared deactivated, comparing aware phobic and fear-relevant conditions. Thus, a shift from top-down control to an affectively driven system optimized for speed was observed in phobic relative to fear-relevant aware processing. (PsycINFO Database Record (c) 2006 APA, all rights reserved) (journal abstract)
|
|
| 17. |
- Carvalho, D. D., et al.
(författare)
-
Deep neural networks for plasma tomography with applications to JET and COMPASS
- 2019
-
Ingår i: Journal of Instrumentation. - : Institute of Physics Publishing (IOPP). - 1748-0221. ; 14
-
Tidskriftsartikel (refereegranskat)abstract
- Convolutional neural networks (CNNs) have found applications in many image processing tasks, such as feature extraction, image classification, and object recognition. It has also been shown that the inverse of CNNs, so-called deconvolutional neural networks, can be used for inverse problems such as plasma tomography. In essence, plasma tomography consists in reconstructing the 2D plasma profile on a poloidal cross-section of a fusion device, based on line-integrated measurements from multiple radiation detectors. Since the reconstruction process is computationally intensive, a deconvolutional neural network trained to produce the same results will yield a significant computational speedup, at the expense of a small error which can be assessed using different metrics. In this work, we discuss the design principles behind such networks, including the use of multiple layers, how they can be stacked, and how their dimensions can be tuned according to the number of detectors and the desired tomographic resolution for a given fusion device. We describe the application of such networks at JET and COMPASS, where at JET we use the bolometer system, and at COMPASS we use the soft X-ray diagnostic based on photodiode arrays.
|
|
| 18. |
- Ekberg, Ewacarin, et al.
(författare)
-
Can MRI Observations Predict Treatment Outcome of Lavage in Patients with Painful TMJ Disc Displacement without Reduction?
- 2015
-
Ingår i: Journal of Oral & Maxillofacial Research. - : Kaunas University of Medicine. - 2029-283X. ; 30:1
-
Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The purpose of this study was to examine magnetic resonance imaging findings in patients with painful disc displacement without reduction of the temporomandibular joint to determine whether the findings were able to predict treatment outcome of lavage and a control group treated with local anaesthesia without lavage in a short-term: 3-month perspective. MATERIAL AND METHODS: Bilateral magnetic resonance images were taken of 37 patients with the clinical diagnosis of painful disc displacement without reduction. Twenty-three patients received unilateral extra-articular local anaesthetics and 14 unilateral lavage and extra-articular local anaesthetics. The primary treatment outcome defining success was reduction in pain intensity of at least 30% during jaw movement at the 3-month follow-up. RESULTS: Bilateral disc displacement was found in 30 patients. In 31 patients the disc on the treated side was deformed, and bilaterally in 19 patients. Osteoarthritis was observed in 28 patients, and 13 patients had bilateral changes. Thirty patients responded to treatment and 7 did not, with no difference between the two treated groups. In neither the treated nor the contralateral temporomandibular joint did treatment outcome depend on disc diagnosis, disc shape, joint effusion, or osseous diagnoses. Magnetic resonance imaging findings of disc position, disc shape, joint effusion or osseous diagnosis on the treated or contralateral side did not give information of treatment outcome. CONCLUSIONS: Magnetic resonance imaging findings could not predict treatment outcome in patients treated with either local anaesthetics or local anaesthetics and lavage.
|
|
| 19. |
- Englesson-Sahlström, Lotta, et al.
(författare)
-
Lavage question in treatment of painful reduced mouth opening capacity
- 2008
-
Ingår i: Journal of Cranio-Maxillofacial Surgery. - 1010-5182 .- 1878-4119. ; 36:Suppl 1, s. 162-163
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- OBJECTIVES: To compare treatment with local anaesthetics and local anaesthetics and lavage in patients with temporomandibular joint (TMJ) pain and reduced mouth opening in a randomized controlled trial. METHODS: Forty-one women and four men (mean age 35 years) participated. All patients had had TMJ pain för more than 3 months, had reduced mouth opening capacity, and had non-reducin disc displacement confirmed by magnetic resonance imaging. The patient were randomized to treatment with extra-articular local anaesthetics alone (control) or with extra-articular local anaesthetics and lavage (treatment). All patients were examined at basline and at 1 and 3 months by an examiner blind to treatment. Successful treatment was determined as 30% or more pain reduction on a 100-mm visual analog scale (VAS). RESULTS: At baseline, mean pain intensity (VAS) on movement of the TMJ was 58 among the controls and 61 in the treatment group. At the 3-month folow-up, treatment was considered succesful in 76% of the controls and 50% of the treatment group. Mouth opening capacity without assistance was 34 mm and 33 mm at baseline and 43 mm and 38 mm after 3 months among the controls and in the treatment group, respectively. These differences between groups in median pain intesity, successful treatment outcome, and mouth opening capacity with assistance were nonsignificant. CONLUSIONS: Use of lavage to supplement extra-articular local anaesthetic treatment of painful reduced mouth opening at non-reducing discs does not appear to improve treatment outcome.
|
|
| 20. |
- Englesson Sahlström, Lotta, et al.
(författare)
-
Lavage Questionable in Treatment of Painful Reduced Mouth Opening (Stockholm)
- 2008
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Objective: To compare treatment with local anaesthetics and local anaesthetics in combination with lavage in patients with temporomandibular joint (TMJ) pain and reduced mouth opening in a randomized controlled trial. Material and methods: Forty-one women and four men (mean age of 35 years) participated. All patients had had TMJ pain for more than 3 months, had reduced mouth opening capacity, and had non-reducing disc displacement confirmed by magnetic resonance imaging. The patients were randomized to treatment with extra-articular local anaesthetic alone (control) or with extra-articular local anaesthetic in combination with lavage (treatment). All patients were examined at baseline and at 1 and 3 months by an examiner blind to treatment. Successful treatment was determined as 30% or more pain reduction on a 100-mm analog scale (VAS). Results: At baseline, mean pain intensity (VAS) of the TMJ during mandibular movements was rated 58 among the controls and 61 in the treatment group. At the 3 months follow-up, treatment was considered successful in 76% of the controls and 50% of the treatment group. Mouth opening capacity was 34 mm and 33 mm at baseline and 43mm and 38 mm after 3 months among the controls and in the treatment group, respectively. These differences between groups in pain intensity (VAS), successful treatment outcome (≥ 30%), and mouth opening capacity (mm) were non-significant between groups. Conclusion: Use of lavage to supplement extra-articular local anesthetic treatment of painful reduced mouth opening at non-reducing dics does not appear to improve treatment outcome. only.
|
|
| 21. |
|
|
| 22. |
- Eriksson, Frida, 1986, et al.
(författare)
-
Interpretative and predictive modelling of Joint European Torus collisionality scans
- 2019
-
Ingår i: Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing (IOPP). - 0741-3335 .- 1361-6587. ; 61:11
-
Tidskriftsartikel (refereegranskat)abstract
- Transport modelling of Joint European Torus (JET) dimensionless collisionality scaling experiments in various operational scenarios is presented. Interpretative simulations at a fixed radial position are combined with predictive JETTO simulations of temperatures and densities, using the TGLF transport model. The model includes electromagnetic effects and collisions as well as (E)over-right-arrow x (b)over-right-arrow shear in Miller geometry. Focus is on particle transport and the role of the neutral beam injection (NBI) particle source for the density peaking. The experimental 3-point collisionality scans include L-mode, and H-mode (D and H and higher beta D plasma) plasmas in a total of 12 discharges. Experimental results presented in (Tala et al 2017 44th EPS Conf.) indicate that for the H-mode scans, the NBI particle source plays an important role for the density peaking, whereas for the L-mode scan, the influence of the particle source is small. In general, both the interpretative and predictive transport simulations support the experimental conclusions on the role of the NBI particle source for the 12 JET discharges.
|
|
| 23. |
|
|
| 24. |
- Eskafi, Mahmoud, et al.
(författare)
-
The effect of mandibular advancement device on pharyngeal airway dimension in patients with congestive heart failure treated for sleep apnoea.
- 2004
-
Ingår i: Swedish Dental Journal. - 0347-9994. ; 28:1, s. 41283-41283
-
Tidskriftsartikel (refereegranskat)abstract
- Continues positive airway pressure (CPAP) is recommended for treatment of sleep apnoea (SA) in patients with congestive heart failure (CHF) but is not easily tolerated resulting in poor patient compliance. Mandibular advancement device (MAD) is designed to inhibit pharyngeal airway (PAW) obstruction and may be a valuable alternative. It has been proposed that MAD exerts its effect by increasing PAW dimensions. This has not, however, been clearly demonstrated. The aim of this study was to examine the effect of MAD on PAW dimensions and SA in patients with CHF. Seventeen CHF-patients with mild to moderate heart failure, aged 68 +/- 6 years, (mean +/- SD), range 54-75 years, with sleep apnoea-hypopnea index (AHI) > or = 10 were evaluated. PAW dimensions were studied with and without the MAD, using lateral radiographs in supine position. Nocturnal breathing patterns were studied using a portable polysomnographic device during a single night with and without MAD. A reduction of AHI > or = 30% (arbitrary level) for each individual was regarded as a successful treatment. Mean AHI was reduced from 25.1 +/- 9.4 to 14.7 +/- 9.7 (p = 0.003). The PAW increased in its inferior section in 13 patients (p = 0.0001). AHI decreased > or = 30% in 9 patients (p = 0.003) of whom 8 showed increased PAW dimensions. Reduction of AHI was not significantly related to increased PAW dimensions. In conclusion MAD increased PAW dimensions and reduced SA in patients with CHF. The results may indicate that MAD reduces SA by other mechanism than increasing PAW dimensions.
|
|
| 25. |
- Flygare, Lennart, et al.
(författare)
-
Bone histomorphometry using interactive image analysis. A methodological study with application on the human temporomandibular joint.
- 1997
-
Ingår i: European Journal of Oral Sciences. - : Wiley-Blackwell. - 0909-8836 .- 1600-0722. ; 105:1, s. 67-73
-
Tidskriftsartikel (refereegranskat)abstract
- The aim was to develop a reproducible method for bone histomorphometry with the aid of a computerized image analysis program, and to examine the variation when assessing the total and the trabecular bone volume. Histologic sections of 18 temporomandibular joint autopsy specimens were read interactively using a cursor. The two parameters total bone volume and trabecular bone volume, of the condyle and the temporal component respectively, were estimated 2 x by 1 observer using 3 different threshold settings: an automatic, a semi-automatic and a manual technique. The threshold was based on the gray-scale distribution of the image. 2 observers read the same sections with the aid of the semi-automatic technique. The intra-observer variation expressed as coefficient of variation ranged between 1.9% and 7.1% for the different parameters, when the automatic threshold setting technique was employed, and between 2.8% and 8.7% with the semi-automatic technique. The manual technique resulted in a high intra-observer variation with a coefficient of variation between 5.2% and 19.9%. There was a systematic difference between the estimates of the 2 observers. In general, intra- and inter-observer variation was higher in the temporal component than in the condyle. The inter-section variation was moderate, the coefficient of variation ranging from 3.8% to 11.1%. The automatic and semi-automatic techniques resulted in comparable intra-observer variation, with a lower bias in the estimates of the semi-automatic technique. By letting one observer apply the semi-automatic technique, it was possible to achieve fast and reproducible analysis of the total and trabecular bone volume.
|
|
| 26. |
- Flygare, Lennart, et al.
(författare)
-
Bone volume in human temporomandibular autopsy joints with and without erosive changes
- 1997
-
Ingår i: Acta Odontologica Scandinavica. - : Informa Healthcare. - 0001-6357 .- 1502-3850. ; 55:3, s. 167-172
-
Tidskriftsartikel (refereegranskat)abstract
- The aim was to compare the trabecular bone volume (TBV) and the total bone volume (TOBV) of human temporomandibular joints (TMJ) with erosive changes with those of joints without erosive changes. We examined 35 TMJ autopsy specimens from 19 individuals aged 66 88 years. Sagittal sections of the joints were analyzed microscopically for erosive hard-tissue changes. The TBV and the TOBV of the sections were assessed with the aid of computerized image analysis. A significant increase in trabecular and total bone volume was found in condyles with erosive changes (TBV = 21%, TOBV = 54%) as compared with condyles without erosive changes (TBV = 15%, TOBV = 40%). The trabecular bone volume of the temporal component was also increased (TBV = 24%) in joints with erosive changes in the condyle as compared with joints with unaffected condyles (TBV = 16%). The findings indicate that the relative bone mass may play a role in the development of erosive changes in the TMJ.
|
|
| 27. |
- Flygare, Lennart, et al.
(författare)
-
Cartilage matrix macromolecules in lavage fluid of temporomandibular joints before and 6 months after diskectomy
- 1997
-
Ingår i: European Journal of Oral Sciences. - : Wiley-Blackwell. - 0909-8836 .- 1600-0722. ; 105:4, s. 369-372
-
Tidskriftsartikel (refereegranskat)abstract
- The purpose was to investigate if antigenic fragments of aggrecan and cartilage oligomeric matrix protein (COMP) are detectable by enzyme-linked immunosorbent assay in lavage fluids from the temporomandibular joint (TMJ) and to examine if the relative content of these cartilage markers changes during development of osteoarthrosis (OA) after diskectomy. Lavage fluid was obtained at surgery and 6 months postoperatively in 13 patients. Computed tomography or magnetic resonance imaging was without evidence of hard-tissue changes prior to surgery in all patients. In 9 of the patients, sufficient material for analysis was obtained at both examinations. Aggrecan and COMP were detectable in all but 2 fluids, in which the COMP levels were below detection limit. The aggrecan/COMP ratio increased in all 9 patients during the 6-month period, indicating increased release of aggrecan relative to COMP fragments. The changed aggrecan/COMP ratio possibly reflects increased cartilage turnover during development of OA. Changes compatible with OA were present on computed tomography in all cases at the 6-month follow-up. This study shows that the lavage procedure is feasible for obtaining synovial fluid from the TMJ for immunochemical analyses of tissue-derived macromolecules.
|
|
| 28. |
|
|
| 29. |
- Frid, Petrea, et al.
(författare)
-
Fetal posterior cerebral artery configurations in an ischemic stroke versus an unselected hospital population
- 2022
-
Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 0001-6314 .- 1600-0404. ; 145:3, s. 297-304
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Few MRA-based studies have systematically evaluated the prevalence and laterality of a fetal configuration of the posterior cerebral artery (FTP) in ischemic stroke populations versus other populations. This common variant is important in the setting of acute stroke and secondary prevention decisions. Objective: To determine the prevalence and laterality of FTP configurations in MRI-DWI verified acute ischemic stroke patients investigated with MRA, and compare the findings with an unselected hospital population investigated with computed tomography angiography (CTA). We also evaluated the association of FTP with posterior cerebral artery (PCA) territory infarctions. Methods: We reviewed the MRAs of 1407 ischemic stroke patients with acute lesions on MRI-DWI sequences and 546 consecutive CTAs of patients investigated on any indication in a tertiary hospital. The MRA and CTA assessments were made by neuroradiologists blinded to original reports on stroke location and vessel anatomy. Results: The prevalence of any FTP was similar in ischemic stroke patients (31%) and unselected patients (32%). Unilateral FTP was significantly more frequent on the right than on the left side in both groups (15% right vs. 8% left). The presence of FTP ipsilateral to stroke side was not associated with involvement of the PCA territory versus no FTP on the stroke side. Conclusions: FTP is present in approximately 30% of ischemic stroke patients and unselected hospital populations and was detected significantly more frequently on the right versus left side in both groups. PCA territory infarction was not associated with the presence of ipsilateral FTP.
|
|
| 30. |
- Frisk, Fredrik, 1971, et al.
(författare)
-
Pulp exposures in adults--choice of treatment among Swedish dentists.
- 2013
-
Ingår i: Swedish dental journal. - : Sveriges tandläkarförbund. - 0347-9994. ; 37:3, s. 153-60
-
Tidskriftsartikel (refereegranskat)abstract
- This study comprises a survey of Swedish dentists'treatment preferences in cases of carious exposure of the dental pulp in adults.The survey was conducted as part of a comprehensive report on methods of diagnosis and treatment in endodontics, published in 2010 by the Swedish Council on Health Technology Assessment. A questionnaire was mailed to a random subsample of 2012 dental offices where one dentist at each office was requested to answer all questions. Each questionnaire contained one of three sets of questions about endodontic practice routines.Thus around one-third of the subsample received case-specific questions about treating carious exposure. Only general practitioners aged below 70 years were included.The final study sample comprised 412 participants.The dentists were presented with two case scenarios. In Case 1 a 22-year old patient had a deep carious lesion in tooth 36 and in Case 2 a 50-year old patient had a deep carious lesion in tooth 14.The participants were asked to nominate their treatment of choice: pulp capping, partial pulpotomy or pulpectomy. For Case 1, 17 per cent of the respondents selected pulpectomy; the corresponding rate for Case 2 was 47 per cent. Female gender and age group 25-49 years were predictive of selection of less invasive treatment options. However, according to recent guidelines (2011) from the National Board of Health and Wellfare, Swedish dentists are recommended to elect pulpectomy prior to pulp capping/partial pulpotomy when confronted with a tooth having a cariously exposed pulp in adults.
|
|
| 31. |
- Garcia, J., et al.
(författare)
-
First principles and integrated modelling achievements towards trustful fusion power predictions for JET and ITER
- 2019
-
Ingår i: Nuclear Fusion. - : Institute of Physics Publishing (IOPP). - 0029-5515 .- 1741-4326. ; 59:8
-
Tidskriftsartikel (refereegranskat)abstract
- Predictability of burning plasmas is a key issue for designing and building credible future fusion devices. In this context, an important effort of physics understanding and guidance is being carried out in parallel to JET experimental campaigns in H and D by performing analyses and modelling towards an improvement of the understanding of DT physics for the optimization of the JET-DT neutron yield and fusion born alpha particle physics. Extrapolations to JET-DT from recent experiments using the maximum power available have been performed including some of the most sophisticated codes and a broad selection of models. There is a general agreement that 11-15 MW of fusion power can be expected in DT for the hybrid and baseline scenarios. On the other hand, in high beta, torque and fast ion fraction conditions, isotope effects could be favourable leading to higher fusion yield. It is shown that alpha particles related physics, such as TAE destabilization or fusion power electron heating, could be studied in ITER relevant JET-DT plasmas.
|
|
| 32. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Dental digital radiography : a survey of quality aspects
- 2005
-
Ingår i: Swedish Dental Journal. - : Swedish Dental Association. - 0347-9994. ; 29:2, s. 81-87
-
Tidskriftsartikel (refereegranskat)abstract
- The aim was to evaluate the experiences of Swedish general dental practitioners (GDPs) with digital radiography and their opinion on the same, particularly regarding quality issues. A letter was sent to all GDPs in private care in Region Skåne, Sweden, asking whether they used digital radiography (n=513). The response rate was 79%. The number of private GDPs who replied that they used digital radiography was 106. The Public Dental Service in Region Skåne listed 33 GDPs who worked with digital radiography. Based on these answers, a questionnaire was sent to the GDPs working with digital radiography (n=139). The questionnaire comprised 27 questions about the dentists, the system of intra-oral digital radiography, and the GDPs’ experiences of and opinions on issues regarding image quality and quality control. The response rate to the questionnaire was 94%. Almost all, 92%, worked with charge-coupled device (CCD) and complementary metal oxide semiconductor (CMOS) sensors. Most GDPs were satisfied with their digital radiographic system. The majority (65%) experienced problems. Detector failure and trouble with the software were common. The GDPs wrote that they used lower exposure times in digital radiography than traditional film radiography. The estimated reduction in exposure time was said to be between 51% and 75%. Thirtyfive per cent continued to use film parallel with digital radiography. The answers indicated that less than half of the equipment (40%) underwent quality control. Quality controls, when conducted, were undertaken once or twice a year, mainly by technicians from the companies that had sold the digital equipment. Based on the results of the questionnaire, there seems to be a need to improve the maintenance and the quality of digital radiography. It is also important that the GDPs become more aware of the problems that can occur when a new technique is introduced and that they develop the skills to handle these problems.
|
|
| 33. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Digital radiography in general dental practice : An investigation of the display monitor's effect on image quality
- 2006
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Objectives: The aim of this study was to investigate the quality of radiographs acquired with digital technique in general dental practices, especially regarding factors related to the display monitor. A further aim was to evaluate how the enhancement programs were used by the dentists. Methods: Nine-teen general dental practitioners were visited in their clinics. Ambient light (illuminance) in the room was measured. Different technical parameters of the display monitor were noted. Test images and two phantoms, one low-contrast phantom and one line-pair resolution test phantom were used to control the digital system. The use of the enhancement program available in their equipment was evaluated by noting how the dentist used the program on a checking list which different functions were used. Results: The average illuminance in the operating room was 668 lux. All monitors were colour. The study showed that the amount of “light percentage” set initially in the monitor had to be decreased with in average 17% to optimise the results of the test images. The contrast factor was decreased with in average 10%. The general dental practitioners mostly used the possibility to alter brightness and contrast of the different phantom images to obtain the subjectively best image Conclusion: There is a need to improve the knowledge how to handle the digital equipment in general dental practice. A monitor with good quality has to be a given priority as well as ambient light conditions when you read radiographs. There is a need to develop a standardised quality control for digital dental radiography.
|
|
| 34. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Digital radiography in general dental practice. A field study
- 2007
-
Ingår i: Dento-Maxillo-Facial Radiology. - : British Institute of Radiology. - 0250-832X .- 1476-542X. ; 36:5, s. 249-255
-
Tidskriftsartikel (refereegranskat)abstract
- Abstract Objectives: The aim of this study was to conduct a field study to survey the performance of digital radiography and how it was used by dentists in general dental practice. Methods: Nineteen general dental practitioners were visited at their clinics. Ambient light (illuminance) was measured in the rooms where the monitors were placed. Different technical display parameters were noted. Test images and two phantoms—one low-contrast phantom and one line-pair resolution phantom—were used to evaluate the digital system. How the dentists used the enhancement program was investigated by noting which functions were used. Results: Average illuminance in the operating room was 668 lux (range 190–1250 lux). On radiographs of the low-contrast phantom taken at the clinic, the ability to observe the holes decreased as illuminance increased. On average, the “light percentage” initially set on the monitor had to be decreased by 17% and contrast by 10% to optimise the display of the test images. The general dental practitioners used the enhancement programs most often to alter brightness and contrast to obtain the subjectively best image. Large differences between the clinics were noted. Conclusion: Knowledge of how to handle digital equipment in general dental practice should be improved. A calibrated monitor of good quality should be a given priority, as should proper ambient light conditions. There is a need to develop standardised quality controls for digital dental radiography. Key-words: display monitor, enhancement program, digital radiography, quality
|
|
| 35. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Digital röntgen
- 2008
-
Ingår i: Digitala kliniken. - : Gothia Förlag AB. - 9789172055865 ; , s. 29-41
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
| 36. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Effect of ambient light and monitor brightness and contrast settings on the detection of approximal caries in digital radiographs : an in vitro study
- 2008
-
Ingår i: Dento-Maxillo-Facial Radiology. - : British Institute of Radiology. - 0250-832X .- 1476-542X. ; 37:7, s. 380-384
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives: The aim of this study was to investigate how brightness and contrast settings of the display monitor and ambient light level (illuminance) in the viewing room affect the clinician's ability to diagnose carious lesions in digital radiographs. Methods: Standardized radiographs were taken of 100 extracted teeth. Seven observers evaluated the images for approximal carious lesions twice, once under 50 lux and once under 1000 lux room illumination. Monitor brightness and contrast were varied ±50% and ±6%, respectively, to mimic the normal limits of monitor adjustment by an inexperienced user and one optimal setting. This was done by adjusting radiograph brightness and contrast by ±25%. Thus, five radiographs of each tooth were evaluated. Receiver operating characteristic (ROC) analyses were performed. Histological examinations of the teeth served as the criterion standard. A paired t-test was used to evaluate whether differences in the areas under the ROC curves were significant and kappa was used to evaluate intraobserver agreement. Results: When a monitor with optimal brightness and contrast settings was used to detect approximal carious lesions, ambient light levels less than 50 lux were significantly better than levels above 1000 lux (dentin and enamel lesions, P < 0.01; dentin lesions, P < 0.02). Increasing the contrast setting of the monitor by 6% did not change these results; 50 lux was still significantly better than 1000 lux (enamel lesions, P < 0.01; dentin and enamel lesions, P < 0.02) for evaluating radiographs. Intraobserver agreement differed from fair to good. Conclusions: Reducing ambient light to less than 50 lux significantly increased the accuracy of diagnosing approximal carious lesions on a monitor with an optimal brightness setting and an optimal or slightly higher than optimal contrast setting.
|
|
| 37. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Effect of ambient light and monitor brightness and contrast settings on the detection of approximal caries in digital radiographs.
- 2007
-
Konferensbidrag (refereegranskat)abstract
- Abstract Aims: The aim of this study was to investigate how brightness and contrast settings of the display monitor and ambient light level (illuminance) in the viewing room affect the clinician’s ability to diagnose carious lesions in digital radiographs. Methods: Standardised radiographs were taken of 100 extracted teeth. Seven observers evaluated the images for approximal carious lesions twice, once under 500-lux and once under 1000-lux room illumination. Radiograph brightness and contrast were varied ±50% and ±6%, respectively, to mimic normal limits of monitor adjustment by an inexperienced user and one optimal setting. Thus, five radiographs of each tooth were made. Receiver operating characteristic (ROC) analyses were performed. Histologic examinations of the teeth served as the criterion standard. A paired t-test was used to evaluate whether differences in the areas under the ROC curves were significant, and kappa was used to evaluate intra-observer agreement. Results: When a monitor with optimal brightness and contrast settings was used to detect approximal carious lesions, ambient light levels less than 50 lux were significantly better than levels above 1000 lux (dentine and enamel lesions, p<0.01; dentine lesions, p<0.02). Increasing the contrast setting of the monitor by 6% did not change these results; 50 lux was still significantly better than 1000 lux (enamel lesions, p<0.01; dentine and enamel lesions, p<0.02) for evaluating radiographs. Intra-observer agreement differed from fair to good. Conclusion: Reducing ambient light to less than 50 lux significantly increased the accuracy of diagnosing approximal carious lesions on a monitor with an optimal brightness setting and an optimal or slightly higher than optimal contrast setting.
|
|
| 38. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Effect of monitors on approximal caries detection in digital radiographs—standard versus precalibrated DICOM part 14 displays : An in vitro study
- 2009
-
Ingår i: Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics. - 1079-2104 .- 1528-395X. ; 107:5, s. 716-720
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives. The aim of this study was to evaluate if different ways of adjusting brightness and contrast of monitors with different technical standards influence the diagnosis of carious lesions in digital radiographs. Study design. One hundred extracted teeth (premolars and molars) were radiographed. Seven observers evaluated images for approximal carious lesions on 3 monitors: a standard color monitor with brightness and contrast manually adjusted for viewing radiographs, a Digital Imaging and Communication in Medicine (DICOM) part 14 precalibrated color monitor, and a DICOM part 14 precalibrated monochromatic monitor. All evaluations were made in ambient light <50 lux. Receiver operating characteristic curves were plotted to evaluate results. The standard criterion was a histologic examination of sliced teeth. Kappa statistic evaluated intraobserver agreement. Results. No significant difference in accuracy of approximal carious lesion diagnosis was found between the monitors. Intraobserver agreement varied between fair and good. Conclusion. No differences that could affect clinicians’ abilities to detect carious lesions in digital radiographs existed between the standard monitor and the color and monochrome DICOM part 14 precalibrated monitors.
|
|
| 39. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Image Quality of Digital and Film Radiographs in Applications Sent to the Dental Insurance Office in Sweden for Treatment Approval
- 2004
-
Ingår i: Swedish Dental Journal. - : Swedish Dental Association. - 0347-9994. ; 28:2, s. 77-84
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- In July 2002, a new dental insurance program was introduced in Sweden. For all patients over 65 years, prior approval for all prosthetic work would need to be obtained from the Dental Insurance Office. From October to December 2002, 540 cases were randomly selected for evaluation from the 14,624 applications that had been sent from throughout Sweden to the Dental Insurance Office in Lund. Our aims were to appraise the quality of the radiographic examinations and to compare the quality of the digital with the film (X-ray film) radiographs. The radiographic examinations were evaluated as a whole in relation to the proposed treatment and in detail using specific criteria such as density, contrast, unsharpness, angulation, and receptor position error. The quality variables were evaluated as acceptable or unacceptable. A total of 4,687 intra-oral and 206 panoramic radiographs were evaluated. Thirteen per cent of the intra-oral radiographs and 9% of the panoramic radiographs were taken with a digital technique. Most of the digital radiographs—-70% of the intra-oral and 61% of the panoramic radiographs-—were submitted on microdisk. Twentyeight per cent of the intra-oral digital radiographs, however, were submitted on paper. The radiographic quality in 150 cases (28%) were found to be unacceptable for assessment of the proposed treatment. The most common error-—both in digital and X-ray film radiographs-—was in receptor position. Significantly more errors were found in the intra-oral digital radiographs compared to the radiographs taken with X-ray film. Most of the errors in the digital radiographs were detected in the paper copies. In conclusion, it is possible to improve the radiographic quality in applications for treatment approval, and the dentists had more difficulties with the digital technique than with X-ray film.
|
|
| 40. |
- Hellén-Halme, Kristina, et al.
(författare)
-
Web-based calibration of observers using MRI of the temporomandibular joint
- 2012
-
Ingår i: Dento-Maxillo-Facial Radiology. - : British Institute of Radiology. - 0250-832X .- 1476-542X. ; 41:8, s. 656-661
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives Research diagnostic criteria for temporomandibular disorders (RDC/TMDs) were proposed in 1992 with the aim of standardizing and testing methods for diagnosing TMDs. RDC/TMDs have so far been lacking standardized methods for imaging and criteria for imaging diagnosis of disorders of the temporomandibular joint (TMJ). Criteria for disorders of the TMJ have recently been proposed for MRI. The aim of this study was to publish MR images of the TMJ on the web and to test the agreement of five observers using the criteria. Methods 20 cases of MRI of the TMJ were published on the web together with the criteria. The MR images were taken in closed and open mouth positions, and sagittal and coronal views. Five observers diagnosed disc position, disc shape, joint effusion and loose calcified bodies in the TMJ. Results In all cases except one, three or more observers agreed upon the diagnosis. All agreed on whether a loose calcified body was present or not. The second best agreement was obtained for disc position in the sagittal view, where all observers agreed in 16 of the 20 cases. For disc position in the coronal view and the evaluation of the disc shape, observer agreement was lower. Conclusion Criteria were useful in order to standardize and simplify evaluation and thereby probably increase the diagnostic outcome among different observers for MRI of the TMJ. We recommend that the criteria be used internationally to facilitate comparisons between different studies.
|
|
| 41. |
- Hillerberg, Arne, et al.
(författare)
-
Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements
- 1976
-
Ingår i: Cement and Concrete Research. - : Elsevier BV. - 0008-8846. ; 6:6, s. 773-782
-
Tidskriftsartikel (refereegranskat)abstract
- A method is presented in which fracture mechanics is introduced into finite element analysis by means of a model where stresses are assumed to act across a crack as long as it is narrowly opened. This assumption may be regarded as a way of expressing the energy adsorption GC in the energy balance approach, but it is also in agreement with results of tension tests. As a demonstration the method has been applied to the bending of an unreinforced beam, which has led to an explanation of the difference between bending strength and tensile strength, and of the variation in bending strength with beam depth.
|
|
| 42. |
|
|
| 43. |
- Kharazmi, Mohammad, et al.
(författare)
-
Mandibular osteomyelitis associated with paroxysmal nocturnal hemoglobinuria
- 2011
-
Ingår i: International Journal of Oral and Maxillofacial Surgery. - : Elsevier. - 0901-5027 .- 1399-0020. ; 40:12, s. 1441-1444
-
Tidskriftsartikel (refereegranskat)abstract
- A case of osteomyelitis in a 71-year-old woman with paroxysmal nocturnal hemoglobinuria (PNH) is reported. Osteomyelitis of the jaw is a well known condition of the oral and maxillofacial region that may cause severe morbidity. It is well documented that vaso-occlusive crises in sickle cell anaemia, a hemolytic blood disorder, can make the jaw bone susceptible to osteomyelitis. The authors report a case proposing an association between PNH and osteomyelitis of the mandible.
|
|
| 44. |
|
|
| 45. |
- Koh, Kwang-Joon, et al.
(författare)
-
Relationship between clinical and magnetic resonance imaging diagnoses and findings in degenerative and inflammatory temporomandibular joint diseases : a systematic literature review
- 2009
-
Ingår i: Journal of Orofacial Pain. - : Quintessence. - 1064-6655 .- 1945-3396. ; 23:2, s. 123-139
-
Tidskriftsartikel (refereegranskat)abstract
- AIM: To describe evidence for a relationship between diagnoses and findings of clinical examination and diagnoses and findings of magnetic resonance imaging (MRI) examination for degenerative and inflammatory temporomandibular joint diseases. METHODS: PubMed and the Cochrane Library were searched using specific indexing terms and reference lists were hand-searched. Included publications satisfied pre-established criteria. Primary studies were interpreted using a modification of the Quality Assessment of Diagnostic Accuracy Studies (QUADAS) tool. RESULTS: The literature search yielded 219 titles and abstracts. Eighty-two studies were selected and read in full-text. After data extraction and interpretation with the QUADAS tool, 23 studies remained. There was a vast heterogeneity in study design, clinical examination methods, and diagnostic criteria. No clear evidence was found for a relationship between clinical and MRI diagnoses and findings. Several studies reported a relationship between clinical pain and internal derangements diagnosed with MRI, but the calculated odds ratio (OR) for this relationship was generally low (1.54-2.04). ORs for the relationship between pain and disc displacement without reduction (4.82) or between crepitation and disc displacement without reduction (3.71) were higher. CONCLUSION: This review reveals a need for studies with improved quality in reporting of samples, examination techniques, findings, and definitions and rationales for cutoffs, categories, and diagnoses. We recommend that standardized protocols such as the Research Diagnostic Criteria for temporomandibular disorders (RDC/TMD) and the Standards for Reporting of Diagnostic Accuracy (STARD) statement be implemented in future studies.
|
|
| 46. |
- Lagerstrand, Kerstin M, et al.
(författare)
-
Treatment decision in a 4-year-old-boy with left ventricular outpouching after advanced hemodynamical flow evaluation with 4Dflow CMR: A case report.
- 2022
-
Ingår i: Frontiers in pediatrics. - : Frontiers Media SA. - 2296-2360. ; 10
-
Tidskriftsartikel (refereegranskat)abstract
- Background: The present study presents a diagnostic course for the characterization of a congenital left ventricular outpouching (LVO) in a 4-year-old boy with severe neonatal heart failure, evaluating the added value of cardiac magnetic resonance (CMR) 4Dflow. Case presentation: A boy, born at full term, presented with heart failure immediately after birth. Echocardiography showed dilated left ventricle with poor function and LVO was initially interpreted as an aneurysm. No infection, inflammation, or other cause for heart failure was found. With intensive medical treatment, the heart function returned to normal, and eventually, all medication was terminated. At follow-up, surgical treatment of the LVO was discussed but after CMR 4Dflow, a thorough evaluation of the function of the left ventricle as well as the LVO was possible and the LVO was determined a double-chambered left ventricle with a good prognosis. Conclusions: The present case demonstrates the clinical usability of CMR 4Dflow for improved decision-making and risk assessment, revealing advanced hemodynamic flow patterns with no need for operation.
|
|
| 47. |
- Leoo, T, et al.
(författare)
-
Risk factors and treatment at recurrent stroke onset: Results from the recurrent stroke quality and epidemiology (RESQUE) study
- 2008
-
Ingår i: Cerebrovascular Diseases. - : S. Karger AG. - 1015-9770 .- 1421-9786. ; 25:3, s. 254-260
-
Tidskriftsartikel (refereegranskat)abstract
- <i>Background:</i> Much effort has been made to study first-ever stroke patients. However, recurrent stroke has not been investigated as extensively. It is unclear which risk factors dominate, and whether adequate secondary prevention has been provided to patients who suffer from recurrent stroke. Also, the different types of recurrent stroke need further evaluation. <i>Methods:</i> The study included patients with recurrent stroke admitted to twenty-three Swedish stroke centers. The type of previous and recurrent stroke was determined, as well as evaluation (when applicable) of recurrent ischemic stroke according to the TOAST classification. Presence of vascular risk factors was registered and compared to the type of stroke. Also assessed was ongoing secondary prevention treatment at recurrent stroke onset. <i>Results:</i> A total of 889 patients with recurrent stroke (mean age 77) were included in the study. Of these, 805 (91%) had ischemic stroke, 78 (9%) had intracerebral hemorrhage and 6 (<1%) stroke of unknown origin. The most frequent vascular risk factors were hypertension (75%) and hyperlipidemia (56%). Among the 889 patients, 29% had atrial fibrillation. Of the patients in the ischemic group with cardiac embolism, only 21% were on anticoagulation treatment. The majority of the patients (75%) had their most recent previous stroke >12 months before admission. <i>Conclusions:</i> Few patients had a recurrent stroke shortly after the previous stroke in this study. This indicates that it is meaningful to prevent a second event with an adequate long-term treatment strategy for secondary prevention after first-ever stroke. There also seems to be a clear potential for improving secondary prevention after stroke.
|
|
| 48. |
- Limchaichana, Napat, et al.
(författare)
-
Clinical diagnoses and MRI findings in patients with TMD pain
- 2007
-
Ingår i: Journal of Oral Rehabilitation. - : Wiley-Blackwell. - 1365-2842 .- 0305-182X. ; 34:4, s. 237-245
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to correlate clinical diagnoses in temporomandibular disorders patients suffering from pain diagnosed as arthralgia/osteoarthritis or myofascial pain according to the Research Diagnostic Criteria for temporomandibular disorders with findings made on magnetic resonance imaging. The temporomandibular joints of 60 consecutive patients, 41 with arthralgia/osteoarthritis and 19 with myofascial pain, were examined clinically and with magnetic resonance imaging. The most common magnetic resonance imaging findings were disc displacements and structural bone changes, which were found in both pain groups. However, disc displacements were found significantly (p = 0.002) more often in the arthralgia/osteoarthritis group. 104 joints were found to have no clinical diagnosis of disc displacements, but 64 of these joints had findings of disc displacements on magnetic resonance imaging. Joint fluid was found both in the arthralgia/osteoarthritis group (20 patients) and in the myofascial pain group (5 patients). Patients having a combination of disc displacement and joint fluid were significantly (p = 0.047) more common in the arthralgia/osteoarthritis group. In conclusion, the magnetic resonance imaging findings of disc displacement and structural bone changes were common in temporomandibular disorders patients with pain of both myogenous and arthrogenous origin. The clinical diagnoses for subdivision into myogenous and arthrogenous pain groups were not confirmed by magnetic resonance imaging.
|
|
| 49. |
|
|
| 50. |
- Limchaichana, Napat, et al.
(författare)
-
Resilient appliance-therapy treatment outcome in patients with TMD pain correlated to MRI-determined changes in condyle position
- 2009
-
Ingår i: Cranio. - : CHROMA, Inc. - 0886-9634 .- 2151-0903. ; 27, s. 185-193
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this research was to study if changes in condyle position in temporomandibular disorders (TMD) patients could be a factor that is affected by resilient appliance therapy and if it influences the treatment outcome. The study investigated 48 patients randomly assigned to a treatment group (T group = 21 patients, using resilient appliance) or a control group (C group = 27 patients, using nonoccluding appliance). Changes in the condyle-fossa relationship (with and without the appliance) were determined in an MRI examination. Ten weeks after treatment, the treatment outcome was measured. The results showed that with the appliance, change in condyle position occurred in 76% of the T group and 22% of the C group (p < 0.001). Sixty-seven percent (67%) of the T group and 44% of the C group experienced a successful treatment outcome. Treatment outcome was not related to changes in condyle position in patients with TMD pain.
|
|
